On Tue 24-07-18 12:05:35, Bruce Merry wrote: [...] > I've also added some code to memcg_stat_show to report the number of > cgroups in the hierarchy (iterations in for_each_mem_cgroup_tree). > Running the script increases it from ~700 to ~41000. The script > iterates 250,000 times, so only some fraction of the cgroups become > zombies. So this is definitely "too many zombies" to delay the collecting of cumulative stats. Maybe we need to limit the number of zombies and reclaim them more actively. I have seen Shakeel has posted something but it looked more on the accounting side from a quick glance. I can see you are using cgroup v1 so your workaround would be to memory.force_empty before you remove the group. -- Michal Hocko SUSE Labs
